GeoIP includes a C library and command-line tools to look up information in
MaxMind's IP geolocation databases.

The distributed package includes a snapshot of the free GeoLite country-level
databases under CC BY-SA 3.0 license, "This product includes GeoLite data
created by MaxMind, available from http://www.maxmind.com."

Free-of-charge city and AS number databases and updated country databases are
available from http://dev.maxmind.com/geoip/legacy/geolite/, commercial
databases and automatic update services from http://www.maxmind.com/.
